No description
7367b84f8e
There was an existing validation layer in the spinlock implementation, but it was only enabled when both SMP and CONFIG_DEBUG were enabled, which meant that nothing was using it. Replace it with a more elaborate framework that ensures that every lock taken is not already taken by the current CPU and is released on the same CPU by the same thread. This catches the much more common goof of locking a spinlock recursively, which would "work" on uniprocessor setups but have the side effect of releasing the lock prematurely at the end of the inner lock. We've done that in two spots already. Note that this patch causes k_spinlock_t to have non-zero size on builds with CONFIG_ASSERT, so expect a little data and code size increase. Worth it IMHO. Signed-off-by: Andy Ross <andrew.j.ross@intel.com> |
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| kernel | ||
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| soc | ||
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| CODE_OF_CONDUCT.md | ||
| CODEOWNERS | ||
| CONTRIBUTING.rst | ||
| Kconfig | ||
| Kconfig.zephyr | ||
| LICENSE | ||
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| README.rst | ||
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.. raw:: html
<a href="https://www.zephyrproject.org">
<p align="center">
<img src="doc/images/Zephyr-Project.png">
</p>
</a>
<a href="https://bestpractices.coreinfrastructure.org/projects/74"><img
src="https://bestpractices.coreinfrastructure.org/projects/74/badge"></a>
<img
src="https://api.shippable.com/projects/58ffb2b8baa5e307002e1d79/badge?branch=master">
The Zephyr Project is a scalable real-time operating system (RTOS) supporting
multiple hardware architectures, optimized for resource constrained devices,
and built with security in mind.
The Zephyr OS is based on a small-footprint kernel designed for use on
resource-constrained systems: from simple embedded environmental sensors and
LED wearables to sophisticated smart watches and IoT wireless gateways.
The Zephyr kernel supports multiple architectures, including ARM Cortex-M,
Intel x86, ARC, Nios II, Tensilica Xtensa, and RISC-V, and a large number of
`supported boards`_.
.. below included in doc/introduction/introduction.rst
.. start_include_here
Getting Started
***************
To start developing Zephyr applications refer to the `Getting Started Guide`_
in the `Zephyr Documentation`_ pages.
A brief introduction to Zephyr can be found in the `Zephyr Introduction`_
page.
Community Support
*****************
The Zephyr Project Developer Community includes developers from member
organizations and the general community all joining in the development of
software within the Zephyr Project. Members contribute and discuss ideas,
submit bugs and bug fixes, and provide training. They also help those in need
through the community's forums such as mailing lists and IRC channels. Anyone
can join the developer community and the community is always willing to help
its members and the User Community to get the most out of the Zephyr Project.
Welcome to the Zephyr community!
Resources
*********
Here's a quick summary of resources to find your way around the Zephyr Project
support systems:
* **Zephyr Project Website**: The https://zephyrproject.org website is the
central source of information about the Zephyr Project. On this site, you'll
find background and current information about the project as well as all the
relevant links to project material.
* **Releases**: Source code for Zephyr kernel releases are available at
https://zephyrproject.org/developers/#downloads. On this page,
you'll find release information, and links to download or clone source
code from our GitHub repository. You'll also find links for the Zephyr
SDK, a moderated collection of tools and libraries used to develop your
applications.
* **Source Code in GitHub**: Zephyr Project source code is maintained on a
public GitHub repository at https://github.com/zephyrproject-rtos/zephyr.
You'll find information about getting access to the repository and how to
contribute to the project in this `Contribution Guide`_ document.
* **Samples Code**: In addition to the kernel source code, there are also
many documented `Sample and Demo Code Examples`_ that can help show you
how to use Zephyr services and subsystems.
* **Documentation**: Extensive Project technical documentation is developed
along with the Zephyr kernel itself, and can be found at
http://docs.zephyrproject.org. Additional documentation is maintained in
the `Zephyr GitHub wiki`_.
* **Cross-reference**: Source code cross-reference for the Zephyr
kernel and samples code is available at
https://elixir.bootlin.com/zephyr/latest/source.
* **Issue Reporting and Tracking**: Requirements and Issue tracking is done in
the Github issues system: https://github.com/zephyrproject-rtos/zephyr/issues.
You can browse through the reported issues and submit issues of your own.
* **Security-related Issue Reporting and Tracking**: For security-related
inquiries or reporting suspected security-related bugs in the Zephyr OS,
please send email to vulnerabilities@zephyrproject.org. We will assess and
fix flaws according to our security policy outlined in the Zephyr Project
`Security Overview`_.
Security related issue tracking is done in JIRA. The location of this JIRA
is https://zephyrprojectsec.atlassian.net.
* **Mailing List**: The `Zephyr Development mailing list`_ is perhaps the most convenient
way to track developer discussions and to ask your own support questions to
the Zephyr project community. There are also specific `Zephyr mailing list
subgroups`_ for announcements, builds, marketing, and Technical
Steering Committee notes, for example.
You can read through the message archives to follow
past posts and discussions, a good thing to do to discover more about the
Zephyr project.
* **Chatting**: You can chat online with the Zephyr project developer
community and other users in two ways:
* On `Slack`_: Zephyr has dedicated channels on Slack. To register, use the
following `Slack Invite`_.
* IRC channel #zephyrproject on the freenode.net IRC server. You can use the
http://webchat.freenode.net web client or use a client-side application such
as pidgin (Note that all discussions have moved to Slack, although we still
have many developers still available on the IRC channel).
.. _Slack Invite: https://tinyurl.com/yarkuemx
.. _Slack: https://zephyrproject.slack.com
.. _supported boards: http://docs.zephyrproject.org/latest/boards/boards.html
.. _Zephyr Documentation: http://docs.zephyrproject.org
.. _Zephyr Introduction: http://docs.zephyrproject.org/latest/introduction/introducing_zephyr.html
.. _Getting Started Guide: http://docs.zephyrproject.org/latest/getting_started/getting_started.html
.. _Contribution Guide: http://docs.zephyrproject.org/latest/contribute/contribute_guidelines.html
.. _Zephyr GitHub wiki: https://github.com/zephyrproject-rtos/zephyr/wiki
.. _Zephyr Development mailing list: https://lists.zephyrproject.org/g/devel
.. _Zephyr mailing list subgroups: https://lists.zephyrproject.org/g/main/subgroups
.. _Sample and Demo Code Examples: http://docs.zephyrproject.org/latest/samples/samples.html
.. _Security Overview: http://docs.zephyrproject.org/latest/security/security-overview.html